📱 Frontend Framework and Mobile Backend Security Guides

Intro: The security questions for React or Next.js are not the same as the questions for a mobile backend. This page gives short review lenses for those environments.

What this page includes

frontend framework review points

mobile backend review points

where state, secrets, and identity assumptions usually break

practical release checks

React / Next.js

Review for:

server versus client boundary clarity;
secrets excluded from client bundles;
SSR and API route auth behavior;
CSP, cookie, and session defaults.

Mobile backend APIs

Review for:

device identity assumptions separated from user identity;
replay-resistant registration and refresh flows;
abuse controls on login, enroll, and recovery endpoints;
safe handling of push tokens, file uploads, and telemetry.

Shared anti-patterns

role or entitlement checks only in the client;
debug routes and feature flags exposed in production builds;
broad API scopes for mobile clients that should use narrower task-specific routes.

Release checks

build artifacts inspected for secrets;
environment-specific endpoints correct;
app-to-backend auth flows tested for bad states and replay behavior;
frontend telemetry reviewed for data minimization.

Author attribution: Ivan Piskunov, 2026 - Educational and defensive-engineering use.